Results 41 to 50 of about 2,845,707 (370)
Broadband Butler matrix with flat coupling
Electronics Letters, 2007 Conventional Butler matrices composed of hybrids, crossovers and phase shifters, are narrowband structures. Presented is a constant coupling and phase shift broadband Butler matrix with a simple structure using novel disk hybrids and improved phase shifters.
S. Zheng, W.S. Chan, S.H. Leung, Q. Xue
openaire +1 more source
IEEE transactions on microwave theory and techniques, 2023 This article presents a novel $4\times 4$ Butler matrix implemented in the grounded co-planar waveguide (GCPW) technology, compactly integrated with a highly efficient and broadband $1\times 4$ air-filled substrate integrated waveguide (AFSIW) cavity-
Laura Van Messem +8 more
semanticscholar +1 more source
Switch-Beam Vivaldi Array Antenna Based On 4x4 Butler Matrix for mmWave
MATEC Web of Conferences, 2018 It will be diffcult to use either omnidirectional or fixed beam antenna due to the high propagation losses caused by atmospheric absorption at mmWave for 5G mobile communication.
Safitri Nurlaila +2 more
doaj +1 more source
Method of Synthesizing Orthogonal Beam-Forming Networks Using
IEEE Access, 2019 A synthesis method for orthogonal beam-forming networks (BFNs) with arbitrary N inputs and N outputs is presented. Compared to those formerly developed, the new method allows the design of a BFN in order to not only generate arbitrary N orthogonal beams ...
Li Sun, Guanxi Zhang, Baohua Sun
doaj +1 more source
A Compact and Wideband Beam-Scanning Antenna Array Based on SICL Butler Matrix
ElectronicsA compact and wideband beamforming antenna array based on a substrate-integrated coaxial line (SICL) Butler matrix at 60 GHz is proposed in this paper. The cavity-backed patch antenna loading double-ridged horn antenna is designed to enhance a gain of 5 ...
Zhu Hua +4 more
semanticscholar +1 more source
Multi beam observations of cosmic radio noise using a VHF radar with beam forming by a Butler matrix [PDF]
Advances in Radio Science, 2011 The Leibniz-Institute of Atmospheric Physics (IAP) in Kühlungsborn started to install a new MST radar on the North-Norwegian island Andøya (69.30° N, 16.04° E) in 2009.
T. Renkwitz +3 more
doaj +1 more source
Smart antenna beamforming network [PDF]
, 2008 Smart Antenna with RF beamforming capability can greatly improve the performance of the vehicle communication system by providing better link quality and high immunity to interference. Butler Matrix is a well-known beamforming network. It can be used for
Abdul Rahim, Sharul Kamal +1 more
core
Broadband Directional Thermal Radiation with Asymmetric Femtosecond Laser‐Processed Surfaces
Advanced Optical Materials, EarlyView.Femtosecond laser processing is used to scalably create self‐organized angled microstructures which exhibit highly directional emissivity that occurs for all polarizations. Laser parameters are tuned to alter the surface features, control the direction of emission, and enhance the directional emissivity. Electromagnetic modeling is performed to analyze
Andrew Butler +8 more
wiley +1 more source
Sex-gender-sexuality: how sex, gender and sexuality constellations are constituted in secondary schools [PDF]
, 2005 This paper explores the relationships between sex, gender, and sexuality through a series of close readings of data generated through an ethnography undertaken in a south London secondary school.
Youdell, Deborah
core +2 more sources
Advanced Science, EarlyView.This work paves the way for practical photoelectrochemical water splitting devices by addressing key upscaling challenges related to substrate conductivity, absorber inhomogeneity, and mass transfer limitations. Integrated improvements in substrate engineering, material processing, device architecture, and operational conditions allow the development ...
Telmo da Silva Lopes +7 more
wiley +1 more source